Two-dimensional depiction of components of a film extrusion system on an output device

ABSTRACT

An operating panel  10  for film extrusion plants  1  is illustrated that contains at least following elements, an input terminal at which functional parameters of the film extrusion plants can be set. 
         An indicator device  9  on which elements of the film extrusion plant such as extruders  1 , film bubble  3  or nozzle  2  are displayed and if necessary their operating parameters are indicated.        

     It is considered inventive that on the indicator device  9  the arrangement and alignment of elements of the extrusion plant such as extruders  1  or winding positions  8   a   , 8   b  to the blower head  2  or the film bubble  3  can be displayed at least in part and at least two-dimensionally.

The invention concerns an operator panel for film extrusion plants with the characteristics of the generic term of claim 1.

Flat film and blown film extrusion plants are known sufficiently. Such a plant is illustrated in e.g. EP 0 873 846. Usually these plants are controlled by an operating panel. These operating panels usually contain at least the following functional elements:

-   -   an input terminal at which functional parameters of the film         extrusion plants can be set.     -   An indicator device on which the extrusion plant and the         associated extruders and likewise their operating parameters are         displayed.

The operating panels are mounted at an accessible part in the immediate surroundings of the extruder. The operating panel is surrounded by extruders particularly in blown film extrusion plants where the extruders are arranged all around the extrusion plant.

The extrusion plant is usually displayed as a sketch. However in known equipments the display conforms not to the actual arrangement of the extruders around the extrusion nozzle instead the display is in accordance with other standpoints. Most frequently one comes across an arrangement of the extruders according to their numbering. Here the extruders are sketched as if are arranged in a line.

However it is common to all known display types that the extruders are not arranged according to their actual arrangement around the extrusion nozzle and/or the blowing head. This factor leads to difficulties particularly in the case of blown film extrusion plants.

Machine operators who sit at an operating panel of the extrusion plant wherein the operating panel is adjoining the blowing head or—in the case of flat film extrusion—adjoining the nozzle, do not know whether the extruders are displayed on the operating panel in the correct order or whether they are laterally reversed. For these reasons the machine operators must repeatedly ascertain the numbers of the individual extruders. There are similar problems in the allocation of other machine elements such as the operating panel itself or the winding positions.

Therefore the aim of the present invention is to suggest an operating panel that makes it easier for the machine operator to identify these machine elements in the display on the operating panel. This task is solved by the fact that

-   -   The indicator device can display the at least two-dimensional         alignment of elements of the extrusion plant such as extruders         or winding positions to the blowing head or the film bubble.

The invention can be used both in flat film extrusion plants and also in blown film extrusion plants. The term “nozzle” in the generic term of the main claim thus includes a flat die and also a blowing head.

By an operating panel in accordance with the invention the machine operator gets the chance to identify and relate better to his own spatial position in the extrusion plant.

Further design forms of the invention are based on the graphic description and the claims.

The individual figures illustrate:

FIG. 1 An illustration of a blown film extrusion plant in accordance with prior art.

FIG. 2 A representation of a blown film extrusion plant on an indicator device of an operating panel in accordance with the invention.

FIG. 3 A sketch of a blown film extrusion plant with an operating panel.

FIG. 1 illustrates a view of a known indicator device. The extruders 1 are numbered serially with the letters A, B, C and illustrated as if they are arranged in one line. Thus though the outlines of the extruders 1 are illustrated two-dimensionally, their alignment to the blowing head 2 and/or the film bubble 1 is in a one-dimensional line, which is also illustrated near the blowing head, scaled down and thus falsified. Thus the allocation of the extruders is made difficult for the operator. Besides the extruders 1, the melt feed line 7, the blowing head 2 the film bubble 2 and the squeezed film 4 are displayed in sketched form on the indicator 3. Within the outlines of a part of these elements 2, 3 of the extrusion plant, dimensions and measured values are displayed relating to the operating parameters or the other characteristics of the respective elements 2, 3. At the place where actually a winding equipment assigned to the extrusion plant should have been illustrated only a rectangular display panel 5 is provided. Dimensions and measured values referring to a winding equipment are displayed in this display panel 5.

FIG. 2 illustrates a view of an indicator of an operating panel in accordance with the invention. The extruders 1 that are numbered again with capital letters are displayed as per their two-dimensional arrangement around blowing head 2 and film bubble 3. Both the last-mentioned elements and the winding positions 8 a and b (sketched for the first time) that are also numbered with the capital letters A and B show within their—or in the case of the film bubble 3 directly near their—contours dimensions and measured values referring to their physical characteristics or operating parameters. Thus both extruders 1 and also the winding positions are displayed as per their two-dimensional alignment to the extrusion plant. It is worthy of mention that the extruders 1 in FIG. 2 are illustrated in the form of a perspective top view; while the film bubble 2 is illustrated in front view.

FIG. 3 is the sketch of an extrusion plant that contains besides the machine elements 1 to 8 already illustrated in the figures, also an operating panel 10 that contains at least one indicator 9 that is illustrated here as a monitor, a control and/or calculating device 11 and a keyboard 12. The control of the machine elements 1-8 takes place via control lines 13.

The keyboard 12 is accorded the role of an input terminal. However the term input terminal also includes other data input means such as touch-screens or speech recognition programs. List of reference symbols 1 Extruder 2 Blowing head/nozzle 3 Film bubble 4 Squeezed film 5 Display panel 6 air ring 7 Melt feed line 8 a) winding section b) winding section 9 Indicator 10 Operating panel 11 Calculating device 12 Keyboard/input terminal 13 Control lines 14 Resin hopper 15 Already cut sheets 16 17 18 19 20 21 22 23 24 

1. Operating panel (10) for film extrusion plants that includes at least following elements, an input terminal at which functional parameters of the film extrusion plants can be set. An indicator device (9) on which elements of the film extrusion plant such as extruders, film bubble (3) or nozzle (2) are illustrated and, where necessary, their operating parameters are indicated. The operating panel (10) is characterized by the fact that the alignment of elements of the extrusion plant such as extruders (1) or winding positions (8 a, 8 b) to the blowing head (2) or the film bubble (3) can be displayed on the indicator device (9) at least partly and at least two-dimensionally.
 2. Operating panel (10) in accordance with claim 1 characterized by the fact that the nozzle (2) and/or the film bubble (3) can be displayed in the center of the two-dimensional arrangement of extruders (1).
 3. Operating panel (10) in accordance with claim 1 characterized by the fact that the at least two-dimensional arrangement of elements of the extrusion plant such as extruders (1) or winding positions (8 a, 8 b) can be displayed at least partly in top view.
 4. Operating panel (10) in accordance with claim 1 characterized by the fact that the at least two-dimensional arrangement of elements of the extrusion plant such as extruders (1) or winding positions (8 a, 8 b) can be displayed at least partly in a perspective top view.
 5. Operating panel (10) in accordance with claim 1 characterized by the fact that the nozzle (2) and/or film bubble (3) can be displayed in a front view.
 6. Operating panel (10) in accordance with claim 1 characterized by the fact that the winding equipment can be displayed below the arrangement of the extruders (1).
 7. Operating panel (10) in accordance with claim 1 characterized by the fact that apart from the extruders (1) also the two-dimensional arrangement of the resin hoppers allocated to them and/or the dosimetry units assigned to them can be illustrated graphically.
 8. Operating panel (10) in accordance with claim 1 characterized by the fact that the functional elements of the extrusion plant (1) displayed on the indicator device (9) whose operating parameters lie outside a target range, are highlighted on the indicator device (9).
 9. Operating panel (10) according to claim 1 characterized by the fact that functional elements of the extrusion plant (1) whose operating parameters lie outside a target range are highlighted in red color.
 10. Operating panel (10) in accordance with claim 1 characterized by the fact that the operating panel (10) is illustrated as per its actual alignment to the film bubble (3) and/or the blower head (2) between actually adjoining elements of the extrusion plant (1).
 11. Process for the operation and/or monitoring of film extrusion plants (1), whereby the monitoring and operation is carried out by an operating panel (10) that contains an indicator device (9), on which elements of the film extrusion plant such as extruders (1), film bubble (3) or nozzle (2) are displayed and if necessary their operating parameters are indicated, characterized by the fact that on the indicator device the arrangement and alignment of elements of the extrusion plant such as extruders (1) or winding positions (8 a, 8 b) to the blowing head (2) or the film bubble (3) are displayed at least partly and at least two-dimensionally. 